From 3b49e1a2b6ee12e8419363c7b9fbd5f9c98f89bb Mon Sep 17 00:00:00 2001
From: Alexey Yerin <yerinalexey98fd@gmail.com>
Date: Sun, 19 Jul 2020 21:28:06 +0300
Subject: [PATCH] Add check for truncatechar (#420)

* Add check for truncatechar

When value is longer than 1 character, it throws an error

* Use runeSliceWidth instead of len
---
 eval.go | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/eval.go b/eval.go
index 6a0957c..ec30b2e 100644
--- a/eval.go
+++ b/eval.go
@@ -315,6 +315,11 @@ func (e *setExpr) eval(app *app, args []string) {
 	case "timefmt":
 		gOpts.timefmt = e.val
 	case "truncatechar":
+		if runeSliceWidth([]rune(e.val)) > 1 {
+			app.ui.echoerr("truncatechar: value should be 1 character long")
+			return
+		}
+
 		gOpts.truncatechar = e.val
 	default:
 		app.ui.echoerrf("unknown option: %s", e.opt)